Circuit breaker



FIG. 1 is a perspective view of a circuit breaker embodying theinventive design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevation view thereof;

FIG. 7 is a right side elevation view thereof;

FIG. 8 is another perspective view thereof; and,

FIG. 9 is still another perspective view thereof.

The ornamental design for a circuit breaker, as shown and described.